Coiling-machine.



PATENTED JULY 30, 1907.

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1 R W i :1 s in A k W; :6 --l .h 1 ll a mg No. 861,608. PATENTED JULY 30, 1907.

A. T. RICHARDSON. 001mm MACHINE.

APPLIOATION FILED JULY 12. 1906.

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ANDREW T. RICHARDSON, or VERONA, PENNSYLVANIA, ASSIUNOR 'ro venom TOOL WORKS, A CORPORATION OFPPINNSYLVANIA.

COILING-MACHINE.

Specification of Letters Patent.

Patented July 30, 1907.

Application filed July 12,1906. Serial N0. 325,778.

To all whom 'it may concern:

Be it known that I, ANDREW T. RICHARDSON, a citizen of the United States, residing at Verona, in the county of Allegheny and State of Pennsylvania, have invented certain new and .useful Improvements in Coiling-Machines, of which the following is a specification.

My invention relates to machines for coiling rods, wire or other blanks into heliczil forms and has for its object to produce such helices more rapidly and in more perfect form than they are now made by the machines in use.

My improved coiling machine is more particularly adapted to the making of helices from quadrilateral rods or blanks, preferably while hot, which helices are specially designed for subsequent cutting up into single coils to produce the well known split washer type of nut locks. To produce high grade nut locks of this type it is most important that these helices be coded the exact size required, that they be free from irregularities, and that they have a uniform pitch or spacing between successive coils, and that there shall he no distortion of the blank while being coiled.

My machine is also adapted to the coiling of helical springs and to other similar purposes.

I accomplish all these objects by feeding the blank obliquely onto the mandrel at the predetermined pitch which is to be given to the coils, whereas the usual custom is to feed the blank in at right angles to the mandrel. My improved method of feeding, I have found, obviates the-necessity for any grooves on the forming rolls, or for any other spacing device, either on the forming rolls, on. the mandrel, or separate from either, to give the required pitch or spacing to the coils of the helix. By means of this oblique feeding of the blank I am enabled to turn out the highest grade of product from a machine having its operating and wearing parts of most simple and inexpensive construction as will be seen from the following description.

In the accompanying drawings which form part of this specification: Figure 1 shows an elevation view of my improved coiling machine, partly in section. Fig. 2 is a view of the operating parts, the driving means being eliminated, and shows a convenient guiding means for the oblique feed. Fig. 3 shows in elevation the forming rolls and their functional relation to the blank. Fig. 4 is a side view of the same rolls shown in Fig. 3.

Referring again to the drawings: A shaft 1 driven by suitable mwns, as the pulley 22, is mounted in the bearings 33 attached to the bed B, and has the gears 4 and 5 fixed thereon. A hollow shaft 6 is mounted in the bearings 7-7 and has the gear 8 fixed thereon meshing with and rotated by the gear 4. A mandrel 9 of indefinite length projects from the hollow shaft 6 and is made rigid therewith by a set screw'lO. The

projecting end of the mandrel passes through a removable bushing 11 which is adapted to fit the particular diameter of mandrel in use and serves as a bearing therefor and may be provided with a bevel at its outer end to accommodate the obliquely fed blank A. The block 12 has the slotted guide way 14 and an adjusting device which is shown simply in the drawings by means of a movable strip 15 having a slot 16 and a set screw 17. Set screws 18 retain the bushing 11 in position. A head 19 rigidly connected with the gear 20 by the hollow shaft 21 is mounted in the bearing 22 and is rotated by said gear 20 meshing with the gear 5. Forming rolls 23 are attached by suitable pins 24 to their adjusting blocks 25 dove-tailed in the head 19 and adjusted by the set screws 26 and washers 27; suitable set screws 28 retain the axle pins 24.

My improved machine is suitable for coiling all kinds of blanks, wire and the like, but I will describe its operation as particularly applied to the making of helices used in the production of the split washer type of nutlocks, as follows:

The blank A is fed, preferably hot and direct from the heating furnace, into the guide way 14 and onto the mandrel 9, the proper size of mandrel having been inserted and the adjusting strip 15 having been set for the predetermined pitch of the helix to be formed. The blank will therefore be guided out over the revolving mandrel and along side the bevel on the bushing ll, being held against said bevel by the edge of the slotted guide way 14. The head 19 revolves at a higher rate than the mandrel and in the same direction; the forming rolls engage the end of the blank and bend it down and around the mandrel and as the blank is formed into the successive coils of the helix it passes into the hollow shaft 21. In the practice of making these helices for subsequent cutting up into nut-locks it is important that the freshly formed and still red hot helices be not distorted; to this end the tubular receptacle formed by the'hollow shaft may be extended to a suitable length to accommodate the full length of finished helix, and it is apparent that as the hollow shaft revolves in the same direction as the entering helix, the friction on said incoming helix is reduced to a minimum, thus reducing the chances of distortion thereof. The helices as formed pass on out of the hollow shaft to suitable receiving means.

The mandrel 9 is of uniform section throughout and projects from the bushing 11 sufficiently to receive a few coils of the blank and as it becomes worn, may be cut off and extended out at will.

Having thus described my invention claim as new States:

1. in a machine for coiling helices from quadrilateral bars. iheivpmblnatlon of a revolving mandrel, a-plurality of forming rolls of uniform diameter revolving concentric to said mandrel, means for feeding a blank obliquely onto the mandrel without distortion, and means for adjusting the feeding angle of said blank, substantially as described.

2, in a machine for rolling helices from quadrilateral blanks, the combination of a revolving mandrel, a beveled bushing on said niundrel, a plurality of forming rolls having their faces parallel with said mandrel and revolving on a head concentric to said mandrei a slotted g'uide way for feeding the blank obliquely to the mandrel without distortion, and means for adjusting the feeding angle of said blank, substantially as and for the purposes set forth.

In testimony whereof I have aflixed my signature in .presence of two witnesses.

ANDREW '1. RICHARDSON. 

